This is truly sad and a loss for all of us in the scuba community. My condolences to her family and friends. I truly hope we hear from the authorities soon as to what happened. I too have been at Forty Fathom many times. It is NOT for everyone and is also not open to the public to just show up, don your equipment and jump right in, and that's for good reason. It is a site specifically designed for technical training (although there is a minor amount of OW training done there). This is a sinkhole that has a minimum depth of 80 feet with the deepest being 237 feet if I have that right. The surface is covered with duckweed which limits light. A bubbler system is set up right at the surface to push the duckweed away from the floating dock and to keep it out of your equipment. Visibility here is not great. I've mostly seen it at about 10 feet but I'm sure if there are enough divers in there kicking it up it can be worse. There are quite a number of set lines in this hole also. Some are down lines for training while others have items suspended like a Suzuki motorcycle at about 60 feet. There are other items in there such as a catamaran in 110' and an airplane that sits upright (can't remember the depth on that one). So hopefully that provides enough of a description of the actual site without being there. The folks that run Forty Fathom and do the training have done this for years, day in and day out. The site was originally developed by Hal Watts who is known the world over for his expertise in mixed gas diving. He has just recently retired to our utter dismay!! What I'm saying here is this dive site is for advanced divers. The people operating Forty Fathom are expert in what they do. Unfortunately accidents do happen, not just at Forty Fathom, but all over the world. So do not be discouraged from going to this site. We hopefully will all know very soon what happened in this case. In the meantime, happy and always safe diving to you all. SM